| H46 | Optic neuritis | NON-BILLABLE CODE |
| H46.0 | Optic papillitis | NON-BILLABLE CODE |
| H46.01 | Optic papillitis, right eye | BILLABLE CODE |
| H46.02 | Optic papillitis, left eye | BILLABLE CODE |
| H46.03 | Optic papillitis, bilateral | BILLABLE CODE |
| H46.1 | Retrobulbar neuritis | NON-BILLABLE CODE |
| H46.10 | Retrobulbar neuritis, unspecified eye | BILLABLE CODE |
| H46.11 | Retrobulbar neuritis, right eye | BILLABLE CODE |
| H46.12 | Retrobulbar neuritis, left eye | BILLABLE CODE |
| H46.13 | Retrobulbar neuritis, bilateral | BILLABLE CODE |
| H46.2 | Nutritional optic neuropathy | BILLABLE CODE |
| H46.3 | Toxic optic neuropathy | BILLABLE CODE |
| H46.8 | Other optic neuritis | BILLABLE CODE |
| H46.9 | Unspecified optic neuritis | BILLABLE CODE |
